Effects of PS-IPC Supplementation on Muscle Mass and Functional Outcomes in Older Adults

Not Applicable

Terminated

• Conditions: Immune Senescence; Sarcopenia
• Interventions: Dietary Supplement: Oral PS-IPC supplement; Dietary Supplement: Placebo supplement

• Registration Number: NCT00926250
• Lead Sponsor: University of Arkansas

Brief Summary

Sarcopenia, the age-associated loss of skeletal muscle mass and strength, is a frequent precursor to functional impairment, disability, falls, and loss of independence in the elderly. The prevalence of sarcopenia is high, with ≥ 45% of the U.S. population aged 60 years or older sarcopenic. Some possible causative factors include a decline in muscle protein synthesis, inactivity, hormonal changes, pro-inflammatory conditions, and reactive oxygen species within the muscle mitochondria, which may all be exacerbated by inadequate nutritional intake. Since dietary protein is targeted to muscle and muscle mass represents the largest tissue in the body, protein nutrition plays a significant role in muscle metabolism.

SPECIFIC AIMS The specific aim of this proposed study is to determine the effect of PS-IPC supplementation on muscle mass, muscle strength, muscle quality, and inflammatory / immune markers in healthy older adults. Subjects scoring 4 - 10 on the Short-Physical Performance Battery and aged 60-85 years will consume PS-IPC supplements or placebo three times daily for 12 weeks.

HYPOTHESES

1. Subjects consuming PS-IPC will have a greater increase in muscle mass and muscle strength compared to a control group consuming a placebo supplement.

2. Subjects consuming PS-IPC will demonstrate a greater increase in the fractional rate of muscle protein synthesis compared with a placebo control group.

3. Subjects receiving PS-IPC will have a reduction in plasma concentrations of various inflammatory markers of immune function, compared to subjects consuming the placebo.

Detailed Description

Not available

Study Timeline

• Study Start: 2009-06
• Study First Submitted: 2009-06-22
• Study First Submitted QC: 2009-06-22
• Study First Posted: 2009-06-23
• Status Verified: 2012-01
• Primary Completion: 2012-01
• Study Completion: 2012-01
• Last Update Submitted: 2012-01-17
• Last Update Posted: 2012-01-18

Recruitment & Eligibility

• Status: TERMINATED
• Sex: All
• Target Recruitment: 18

Inclusion Criteria

• BMI of less than or equal to 35 kg/m2, be weight stable (+/- 5 kg) over the previous 4 months (via oral report), report the absence of alcohol or drug abuse, require minimal help in performing activities of daily living, and have a Short Physical Performance Battery score of 4 - 10.

Exclusion Criteria

• Subjects with acute or chronic disease or who may be using drugs that might interfere with skeletal muscle metabolism / function or immune function will be excluded from participation. Other exclusion criteria include cognitive deficits identified by a Mini-Mental State Examination score < 24, mobility impairment requiring a wheelchair, infections, endocrine diseases (e.g., diabetes or untreated thyroid dysfunction), active inflammatory conditions, autoimmune disorders, renal dysfunction, anemia (hemoglobin < 11.5 g/dL), cardiac problems in preceding 3 months or congestive heart failure, chronic obstructive lung disease, neoplasia other than of the skin during the preceding 5 years, influenza vaccine within last 3 weeks or other vaccines within last 6 weeks, known systemic reaction to any immune function test antigen, and use of the following drugs: immunosuppressants, antianginal agents, antiarrhythmics, antibiotics within last 2 weeks, and oral steroids. Other conditions may be used as inclusion / exclusion criteria at the discretion of the study physician to ensure the safe participation of potential study subjects.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
PS-IPC supplementation	Oral PS-IPC supplement	-
Placebo supplementation	Placebo supplement	-

Primary Outcome Measures

Name	Time	Method
Muscle protein synthesis	14-16 months

Secondary Outcome Measures

Name	Time	Method
Self-perceived quality of life	14-16 months
Body composition	14-16 months
Skeletal muscle strength and function	14-16 months
Immune function	14-16 months
Physical activity level	14-16 months

Trial Locations

Locations (1)

University of Arkansas for Medical Sciences; 🇺🇸 Little Rock, Arkansas, United States